Automobile-jack



J. w. PAXSON.

AUTOMOBILE JACK.

APPLICATION FILED NOV. 17, 1919.

1,347,228, Patented July 20, 1920.

2 g1 21 201.916 22 10 ii i 5 w 6 J INVENTOR. 170/771 Wfaxson,

BY CJM UNITED STATES P ATENT OFFICE.

J OHN W. PA-XSON, O-F PHILADELPHIA, PENNSYLVANIA.

AUTOMOBILE-JACK.

Application filed November 17, 1919.

To all whom it; may concern:

Be it known that 1, JOHN W. PAXSON, a citizen of the United- States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Automobile-Jacks, of which the following is a specification.

The object of this invention is to provid'e an improved portable ack particularly adapted to the many uses demanded of the same by automobilists in connection with both commercial and pleasure vehicles.

, A further object is to provide a jack of a construction which will uniformly withstand the greatest possible amount of wear and tear, that is possess an eminently rugged construction yet so arranged as to insure the greatest possible efficiency in operation.

lVith these and other objects in view, the present invention comprises further novel features clearly brought out in the following description when read in conjunction with the accompanying drawings, in which Figure 1 is a side elevation of the preferred embodiment of the invention; Fig. 2 is a vertical diametrical view of the same; Fig. 3 is a horizontal section taken upon a line immediately below the upper closure plate,

beneath which are housed the operating gears.

Referring to the drawings, a suitable base member 1 is preferably provided, upon and secured to which at spaced intervals by suitable means 2 is a hollow stand 3, having a lower outwardly flanged portion 4 directly contacting with said base member. per portion of the member 3 is outwardly flared adjacent to its uppermost portion, and thus emerges into a radially extending circumferential flange 5 peripherally bounded by a cylindrical flange 6, which at the forwardmost portion is interrupted by a substantially semi-circular offset portion 7.

At the point where the flange 5 joins the member 3, an internally arranged annular recess 8 is provided, in which are housed anti-friction means 9, such as ball-bearings or roller-bearings of suitable construct-ion, number and arrangement. Resting then upon the upper surface of the flange 5 is a gear-wheel 10 provided with a centrally threaded aperture 11, through which extends a threaded bar 12, provided upon its lowermost end portions with an enlarged washer or flange 13, and having secured to Specification of Letters Patent.

The up- Patented July 20, 1920.

Serial No. 338,484.

its uppermost portion a substantially, V-

shaped member 1-1, adapted to receive and sprocket-wheel 18 which revolves within the offset 7. The said shaft is journaled through an aperture 19 within a plate 20, which is secured at spaced intervals by suitable means 21 to the uppermost free edge portlons of the flange 6 and offset 7 thereof to lnclose and protect the said gear, pinion and sprocket-wheel from dirt or direct inury by other means.

Said plate is furthermore provided with an aperture 22 surrounded by a cylindrical flange 23, through which slidably extends the threaded rod 12, as the latter is raised and lowered by means of its cooperation with the gear 10 when the same is revolved by the pinion 17 and sprocket-wheel 18.

In order to most feasibly operate the said sprocket-wheel, a suitable sprocket-chain is provided, which same cooperates with said wheel, and therefrom extends outwardly through apertures 25 in the oflset portion 17 of the flange 6. It should also be noted that, while the jack when bearing a weight is raised and lowered by means of the chain and sprocket-wheel construction, it can also be raised and lowered when not carrying a weight, by simply revolving the head 14 and rod 12 in either direction as may be desired.

Having thus described my invention, what I claim and desire to protect by Letters Pat ent of the United States is 1. A lifting jack, comprising the combination of a hollow member, provided with a flange upon its upper end portion, a gear wheel revolubly mounted with respect to said flange and provided with a central threaded aperture, a threaded rod extending through said aperture, a pinion mounted upon said flange and meshing with said gear, an operating member secured to revolve with said pinion, a plate supported in spaced relation above said flange, and means for supporting said pinion and said last-named flan e and an annular roove located adacent to the union of said member with said flange, anti-friction means within: sald groove, a gear supported directly by said anti-friction means and provided with a centrally positioned threaded bore, a plate supported by and in spaced relation with said flange and having a centrally positioned aperture in alinement with the aperture in said gear, a threaded rod in operative engagement .with the threads of the gear bore and slidable through said plate aperture, a pinion and a sprocket-Wheel to operate the same rotatably supported by and between said flange and said plate.

3. 'A lifting jack, comprising the combination of a hollow member, provided upon its upper portion with a, radially extending V flange and an annular groove located adjasignature.

cent to the union of said member with said flange, anti-friction means within said said gear, a threaded rod in operative engagement with the threads of the gear bore and slidable through said plate aperture, a pinion and means to operate the same rotatablysupported by and between said flange and said plate, means carried by the lower end. of said rod to prevent the accidental displacement of the latter from said gear aperture, and a sprocket-chain partially encircling said sprocket-wheel and operative to rotate the same to revolve the pinion to revolve the said. gear and to thereby actuate said rod longitudinally. a V

Intestimony whereof I have afiixed my JOHN, w. rAXsoN. 

